The Fresh Water Fishes of the Island of Formosa. 243 



40. Candidia barbata (Regan). 

 Koeko or Gogahii (Formosa). 



1908. Opsariichlhys barbaius Regan, Ann. Mag. Nat. Hist. (8), II, p. 359; Lake 

 Candidius, Formosa. 



1909. Candidia barbata Jord.-vn & Richardson, Mem. Carneg. Mus., IV, no. 4, 

 p. 169; Lake Candidius (after Regan). 



Head 3.6 in length; depth 3.66; D. 3, 7; A. 3, 9; P. 15; \\ 9; width of 

 head 2 in its length; snout 3 in head; interorbital space 2.7; eye 5; 

 pectoral 1.5; ventral 1.75; fifty-six scales in the lateral line, three 

 between the latter and the root of ventral, eight between lateral line 

 and middle of belly; gill-rakers 3 + 8; pharyngeal teeth 5, 4, i — i, 4, 5. 



Body elongate, compressed, curvature of the dorsal profile equal to 

 that of the ventral; head rather long, lower parts of operculum and 

 suborbicular parts with a number of tubercles; snout truncated in 

 front, partially covering the upper lip, its sides provided with conical 

 tubercles, of which the anterior ones are larger; a notch in front of eye; 

 mouth oblique, extending beyond the anterior border of orbit; upper 

 lip thicker than the lower, the proximal half of which is provided with 

 a series of large conical tubercles; upper jaw slightly protruding; two 

 very short maxillary barbels; eyes anterior and superior; nostrils close 

 together, superior, in front of eye. 



Origin of dorsal midway between tip of snout and base of caudal, 

 inserted above the origin of ventral, anterior rays longer; pectorals not 

 reaching ventrals; anal entirely behind the dorsal, middle rays pro- 

 longed, each ray with traces of tubercles; caudal fin forked, each lobe 

 sharply pointed; depth of caudal peduncle 2.33 in head. 



Body covered with small scales; lateral line continuous, slightly 

 decurved, extending along the lower part of the tail. 



Color in formalin yellowish gray above, paler below, belly whitish; 

 basal two-thirds of the membrane of the dorsal black; caudal fin gray- 

 ish; the rest of the fin dusky white, with faint black mottlings; a black 

 longitudinal band from the nape to the base of caudal. 



Total length 120 mm. 



Described from a specimen from Jitsugetsutan, collected by T. Aoki 

 in August, 1916. 



Habitat: Jitsugetsutan (Lake Candidius); Shito, Giran. 



Remarks: The tubercles on the head and anal fin are very distinct 

 in male specimens, while the anal of the female is nearly smooth. 

 Lower parts of caudal peduncle of male sometimes tuberculated. 



